Portable routing and profiling machine



NW. l1 1924. r 1,514,894

R. L. CARTER PORTABLE? ROUTING AND PROFILING MACHINE Filed Sept. 29, 1923 2 ShOQtl-ShQQt 1 R. L CARTER PORTABLE I XOUTIiIG AND PROFILING MACHINE:

Fi led s'ept. 29 192a zsrmu-snuz 2 Patented Nov. 11, 1924.

i UNITED STATES PATENT OFFICE.

RAY L. CARTER, 0F SYRACUSE, NEW YORK.

PORTABLE ROU'JJING- AND PROFILING MACHINE.

Application filed September 29, 1923. Serial No. 665,644. 1

To all whom it may concern:

Be it known that I, RAY L. CARTER, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented certain object is to provide a relatively small highspeed motor, which is inclosed in an insulated casing, and which may be held and operated by one hand, the said casing being arranged for adjustably mounting the motor. A further object is to provide a novel detachable support, whereby the motor, and

'cutting tool driven thereby, may be adjusted axially, relatively to a plane surface of the support, which contacts with and is movable over the work, during the routing and other operations. A further object is to provide means for predetermining the depth of the routing or profiling work, and

for guiding and steadying the tools. And-- a further object is to provide means for adjusting the support to suit variations of the diameter of the motor casing, and for locking the casing and support together for maintaining the various adjustments.

I attain these objects by the means set forth in the detailed description which follows and as illustrated by the accompanying drawings, in which Figure 1 is an elevational view of the encased motor with a cutting tool attached. Fig. 2 is a front side elevation of the motor and support; showing the routing tool in action; also showing the manner adjusting the said parts. Fig. 3 is an end elevation of the combined device. Fig. 4 is a top plan view of the device shown in Fig. 2. Fig. 5 is a bottom face view of the same. Figs. 6 and 7 are views showing the means for guiding the routing or profiling tool. Fig. 8 is a view showing modified means for adjustably connecting the motor and the support. And Fig. 9 is a central section, taken on line 9-9 of Fig. 1.

In the drawings, 2 represents an electric motor having the usual armature shaft 2. 3 is the cylindrical casing or shell, pref- -Fig. 2).

erably made of insulating material, which incloses the motor, the top end thereof being closed by a cap 4., which supports one end of the shaft 2. Cap 4. is provided with an insulated boss 4., in which is disposed the contacts or terminals l -4 of the motor circuit. The electric parts are usually supplied with current by a flexible cord, (not shown), which connects the said terminals with an ordinary electric lamp-socket. The lower end of the casing 3 is closed by a hollow conical cap 6, which supports the correspondingend' of the armature shaft,

the said shaft extending beyond the cap and being threaded as at 2, for attaching various tool holders or chucks, as 7. The caps 4 and 6 are both slotted for air-cooling the motor,

a in the usual manner, and for this purpose a fan 8 is mounted on and driven by the shaft 2' (see Fig. 9). A represents one of many differently formed tools, which may be operated by the device for routing, or for any other boring, shaping, or profiling work (see Figs. 2, 6 and 7). When the tool is employed for profiling work, the holder 7 is usually formed with a reduced cylindrical guard 7, which may engage and follow the perimeter of a templet or pattern B, while the toolv is performing its work (see Figs. 6 and 7).

For routing and for various other precise work, Where the tools require steadying and guiding for effecting cuttings to uniform depths, the motor 3 is mounted in a novel support 9, which consists of a relativel broad base, having a plane bottom 9 whic engages and may be moved over a flat surface of the work during the cutting operations (see Fig. 2). The plane face 9 of the base is cut away, as at 9 in Fig. 5, for affording access to the tools and their holders, as well as for facilitating the spotting and observation of the performance of .the tools, and the escape of the chips and dust resulting from their work. The body of the sup port is hollow and substantially cylindrical, and its top end is internally threaded for engaging threads 3 of the shell 3, by means of which the motor and the support may be readily, quickly and accurately adjusted relatively to each other, for varying the depthof the cutting of the tool A (see In practice, the threads of the shell 3 and support 9 are preferably about one-sixteenth inch pitch, so' that each revolutionlof the motor or support in either direction moves the tool A correspondingly.

By this arrangement the relatively fine subdivisions of the unit of measure, as well as greater fractional parts of an inch, may be arrived at instantlywithout tediousalcula-z tions. The threaded top end of the support ispreferably split, as at 9", and is provided.

' the motorvand support have been properly adjusted, the'screw 10 is tightened up for preventing accidental shifting of the parts. The opposite sides of the-support, are cut away, as at 9, for reducing the weight of the support, as well as for facilitating observation of the performance "of the tools, and the removal of the chips and shavings. Near the base the support is provided with radial wings 9 for facilitating the manual operation of the support.

In Fig. 8 is shown a modified cap 12, having a cylindrical portion 12', which loosely telescopes the motor casing 3 the said portionbeing internally threaded to receive the 1 externally threaded top end of thesupport 9. The cap 12 may be made of metal and is prefer ably secured to the casing 3 by screws 3 i The fan 8 draws the air downwardly through the slotted openings of the'cap 6. Where the motors are operated at speeds above 7,000 R. P. M., the relatively small fan 8 is incapable of keeping the motors cool. To overcome this trouble, I provide a disk 13, which is disposed in the cap 6, preferably between the fan and the armature the said disk having a centralopening 13' through which the air is sucked by the fan. The disk 13 divides the relatively large hollow chamber in which the fan is disposed, and tends to prevent the fan from churning, instead of evacuating, the air. My routing and profiling device is exf tremely simple, light, and compact, and may be produced at small cost. Owing ;i tg its small size, and light weight, it may*be readily carried from place to place'and applied to work that isusually inaccessible to the largerand heavier permanently installed machines.

Havingthus described my invention what I claim, 1s

1. A portable profiling machine including a motor having a shaft, a tool supported by said shaft, a casing inclosing said motor, a portion of said casing being threaded, a hollow cylinder having a split threaded portion adapted to engagethe threaded portion 'of said casing whereby said tool may be moved relatively to the work and means for locking and holding the casing and in various adjusted positions. a,

2.- .A routerl comprising anlencjasedjmetor adapted to support and dri-ve'a tool,"' a con centric hollow support, havingla-splitportion adapted to adjustably grip the motor casing,,said support having a plane bottom apertured for access to the tool adapted to be moved over the surface ofthe work for guiding the tool during the routine opera-' tions. 3. A router comprising an encased motor including the armature shaft, a tool supported by said shaft, a hollow support for said motor having'a plane bottom adapted to be moved over a surface of the work parallel to the plane of the cutting effected by the tool, one end of'said support being positioning the tool concentric to said plane I bottom and for predetermining the depth of the cutting by said tool.

. 5. The combination of a motor and ashaft driven thereby, a boring tool supported by saidshaft, a casing inclosing said motor, said casing comprising a cylindrical body having circumferential threads, a support for said casing comprising a hollow cylinder having a plane. portion perpendicular 'to the axis of said tool and having itsopposite end threaded and adapted to engage the threaded portion of said casing for adjust ing said tool relatively to said plane portion, and means for clamping the support to said casing for preventing accidental shift- I ing of said parts...

6. The combination with a motor and a shaft driven thereby, of a tool supported and driven by said shaft, a cylindrical body for supporting said motor, said motor and saidibody alinmg axially and adapted to be moved relatively to each other for pre-determining'the depth of the cutting by said tool, and means for locking and holding the motor and said support in various adjusted positions.

7 A portable routing machine comprising a hollow cylindrical body having a plane surface adapted to be moved over the work,

a motor supported by said body, said motor having an externally threaded shell adapted to be screwed into said body and having a shaft adapted to support a tool in axial alignment with said body, said motor adapted to be rotated 'for feeding the tool ing the armature shaft adapted to support a tool, of a cylindrical shell inclosing said motor, said shell being threaded, a support threaded oradjustably receiving said shell the opposi e end of said support comprising a plane arranged perpendicular to the axis comprisinfi a hollow body having one end of the tool and having an aperture through which the ,tool may be projected when either the body or the shell are rotated in the proper direction, and means for clamping the body. to the shell for preventing accidental endwise movement of said tool.

9. A machine of the class described, comprising a motor and a tool driven thereby, a c lindrical shell inclosing said motor, a

hol ow cylinder adapted to telescopically receive said shell, means for moving said support and said shell axially relatively to each other for predetermining the depth of the work effected by said tool, and means for clamping and holding the support and the motor rigid while the tool is performing its work..

10, A portable router and profiler, comprising an encased motor including the armature shaft and a tool driven b said shaft, the casing of said motor being t readed, a support for the motor havin 1 a plane surface perpendicular to the axis of the tool, and having a split portion adapted to adjustably receive the threaded portion of the casing whereby said shaft maybe moved;

axially for predetermining the depth of the cutting by said tool.

, In testimony whereof I afiix my signature.

RAY L. CARTER. 

